I have shot PLENTY of high brass thru it. And, I have never had a problem with that, just low brass target loads. That said, I have not tried anything other than Federal target loads - yet. I'll try another brand. Maybe it will like that better?
Although I have never had the thing "dripping with lubricants" of any type, I have used Enos' red Slide-Glide on the bolt area as well as a little Rem-Oil or equivalent.
It did cycle these loads better after I installed the CarrierComp tube and Wolf spring. But as stated, I had a couple of FTE but my daughter who is learning had quite a few.
I have to get it set up for turkey loads and chokes now, but before I do I'll run it again and try a firmer stance and shoulder!